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// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package elfexec
import (
"debug/elf"
"testing"
)
func TestGetBase(t *testing.T) {
fhExec := &elf.FileHeader{
Type: elf.ET_EXEC,
}
fhRel := &elf.FileHeader{
Type: elf.ET_REL,
}
fhDyn := &elf.FileHeader{
Type: elf.ET_DYN,
}
lsOffset := &elf.ProgHeader{
Vaddr: 0x400000,
Off: 0x200000,
}
kernelHeader := &elf.ProgHeader{
Vaddr: 0xffffffff81000000,
}
kernelAslrHeader := &elf.ProgHeader{
Vaddr: 0xffffffff80200000,
Off: 0x1000,
}
ppc64KernelHeader := &elf.ProgHeader{
Vaddr: 0xc000000000000000,
}
testcases := []struct {
label string
fh *elf.FileHeader
loadSegment *elf.ProgHeader
stextOffset *uint64
start, limit, offset uint64
want uint64
wanterr bool
}{
{"exec", fhExec, nil, nil, 0x400000, 0, 0, 0, false},
{"exec offset", fhExec, lsOffset, nil, 0x400000, 0x800000, 0, 0x200000, false},
{"exec offset 2", fhExec, lsOffset, nil, 0x200000, 0x600000, 0, 0, false},
{"exec nomap", fhExec, nil, nil, 0, 0, 0, 0, false},
{"exec kernel", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0xffffffff82000198, 0xffffffff83000198, 0, 0x1000000, false},
{"exec kernel", fhExec, kernelHeader, uint64p(0xffffffff810002b8), 0xffffffff81000000, 0xffffffffa0000000, 0x0, 0x0, false},
{"exec kernel ASLR", fhExec, kernelHeader, uint64p(0xffffffff810002b8), 0xffffffff81000000, 0xffffffffa0000000, 0xffffffff81000000, 0x0, false},
// TODO(aalexand): Figure out where this test case exactly comes from and
// whether it's still relevant.
{"exec kernel ASLR 2", fhExec, kernelAslrHeader, nil, 0xffffffff83e00000, 0xfffffffffc3fffff, 0x3c00000, 0x3c00000, false},
{"exec PPC64 kernel", fhExec, ppc64KernelHeader, uint64p(0xc000000000000000), 0xc000000000000000, 0xd00000001a730000, 0x0, 0x0, false},
{"exec chromeos kernel", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0, 0x10197, 0, 0x7efffe68, false},
{"exec chromeos kernel 2", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0, 0x10198, 0, 0x7efffe68, false},
{"exec chromeos kernel 3", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0x198, 0x100000, 0, 0x7f000000, false},
{"exec chromeos kernel 4", fhExec, kernelHeader, uint64p(0xffffffff81200198), 0x198, 0x100000, 0, 0x7ee00000, false},
{"exec chromeos kernel unremapped", fhExec, kernelHeader, uint64p(0xffffffff810001c8), 0xffffffff834001c8, 0xffffffffc0000000, 0xffffffff834001c8, 0x2400000, false},
{"dyn", fhDyn, nil, nil, 0x200000, 0x300000, 0, 0x200000, false},
{"dyn map", fhDyn, lsOffset, nil, 0x0, 0x300000, 0, 0xFFFFFFFFFFE00000, false},
{"dyn nomap", fhDyn, nil, nil, 0x0, 0x0, 0, 0, false},
{"dyn map+offset", fhDyn, lsOffset, nil, 0x900000, 0xa00000, 0x200000, 0x500000, false},
{"rel", fhRel, nil, nil, 0x2000000, 0x3000000, 0, 0x2000000, false},
{"rel nomap", fhRel, nil, nil, 0x0, ^uint64(0), 0, 0, false},
{"rel offset", fhRel, nil, nil, 0x100000, 0x200000, 0x1, 0, true},
}
for _, tc := range testcases {
base, err := GetBase(tc.fh, tc.loadSegment, tc.stextOffset, tc.start, tc.limit, tc.offset)
if err != nil {
if !tc.wanterr {
t.Errorf("%s: want no error, got %v", tc.label, err)
}
continue
}
if tc.wanterr {
t.Errorf("%s: want error, got nil", tc.label)
continue
}
if base != tc.want {
t.Errorf("%s: want 0x%x, got 0x%x", tc.label, tc.want, base)
}
}
}
func uint64p(n uint64) *uint64 {
return &n
}
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